Sea to Summit Spark SpIII -8°c Sleeping Bag

When you need a high performance sleeping bag but don't want to be weighed down by one, the Sea to Summit Spark Splll -8°c Sleeping Bag is the one to reach for. 

The ultra-light and technical Spark™ Series bags are designed to keep you as warm as possible while minimising packed weight and size. A series that spans everything from an ultralight liner to an expedition weight mid-winter bag, the end usage is very different as they reflect a design ethos of matching weather conditions to the lightest bag possible. 

The secret to the impressive performance is a combination of premium materials and thought out design. The RDS 850+ Loft premium goose down, light-gauge #3 YKK zip and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation, which is then tweaked for each model to best fit the use scenario. 

The Ultra-Dry Down™ water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down.

All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The Ultra-Dry Down™ protection also makes the Spark™ an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option.

Features

• Uses a full box baffle construction to accommodate extra down and reduce cold spots
• Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room 
• Vertical baffles on chest optimises positions of down to prevent it moving during use
• Full side zip with two sliders provides easy access and extra ventilation options
• Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it's needed 
• NOTE: This bag is not designed to pair with another